Boiler



Oct. 4, 1932. c. T. CARLSON BOILER Filed Feb. 5, 1951 IN V EN TOR.

A TTORNEYS.

Patented Oct. 4, 1932 CARL T. CABLSON, F ERIE, PENNSYLVANIA, ASSIGNOR TOERIE CITY IRON WORKS OF ERIE, PENNSYLVANIA, A CORPORATION OFZEEINNSYLVANIA BOILER Application filed February 5, 1931.

In the forming of steam boilers it is desirable in some constructions toarrange the tubes in a plane joining the axes of drums of the boiler.Where this is attempted difiiculty is experienced in assembling thetubes both initially and in the servicing of the boiler. The presentinvention is designed to form the tubes in a manner that-permits of easyassembling and still permits the tubes to remain in substantially theplane of the and lower drums, 4: tubes joining the rear drum and thelower drum, 5 upper water and steam tubes oining the front and reardrums, these steam tubes leading from the rear drum and front drum, 7 asteam chamber, and 7a a discharge nipple. A bank of tubes 8 connects thefront and rear drums, this bank of tubes being preferably in a planejoining the axes of the drums. In the present invention these tubes areoil-set intermediate their ends at 9, the off-setting preferablyequalling the spacing of the tubes in the several banks so that the tubeenters an opening 10 in the front drum and an opening 11 in the reardrum off-set one space.

In assembling the tubes 8 one end of the tube is swung down. This givessufficient clearance to permit the entry of the entering end and afterthe entry of the entering end the tube can be swung up to the horizontaland assembled in its opening without difficulty. The tubes thus arrangedpresent no pockets so that there is perfect drainage where the boiler islet down. It is Very desirable to have the tubes at this position inthat these tubes approximate ordinarily the water Serial No. 518,538.

level and the surging of the boiler carries the level in the front drumslightly above that of the rear drum and the direction of delivery tothe rear drum is such that the water and steam carried across readilyseparates and the tubes below this position with the up-turned ends givesome difiiculty in this respect and in respect to drainage. Therefore,the tubes along this plane are very desirable.

What I claim as new is 1. In a boiler, the combination of two drumshaving their axes in approximately the same plane; and tubes connectingthe drums in approximately said plane, said tulips being off-setlaterally intermediate their en s.

2. In a boiler, the combination of two upper drums having their axes inthe same horizontal plane; and tubes connecting said drums inapproximately said plane, said tubles being off-set laterallyintermediate their enc s.

3. In a boiler, the combination of two drums having their axes inapproximately 7 the same plane; and a series of banks of tubes similarlyspaced connecting said drums, one of said banks being substantially inthe plane of the axes of the drums and with the tubes thereof off-setlaterally intermediate their ends, the off-setting equalling one spacebetween the tubes.

In testimony whereof I have hereunto set my hand.

CARL T. GARLSON.

